Is the Glass Half Full?

Are you the type of person who sees the glass as half full, or are you the type of person who sees the glass as half empty?

Optimists are supposed to see the glass as half full, while pessimists are supposed to see the glass as half empty. My take on the age old question leaves me somewhere in between those two answers.

My answer to the question is, "it all depends". This is how I see it, if you start off with an empty glass and then fill it half full of water, then the glass is half full. But if you start with a full glass of water and then empty it until it reaches the half way mark, then the glass is half empty.

So in my opinion, "it all depends" is the best answer, you have to know if there was any liquid in the glass to begin with. To get the liquid to the half way point, did you have to empty or fill the glass, once you know which one it is, only then do you know the answer. Does that make any sense to anybody or does anybody else have a theory about whether the glass is half full or half empty?